I've had a Zen amp before even Revision A (there is Revision C at least by now), a Select amp, a pair of SE34L Monoblocks (amps which don't show up in the catalog) , the SE34I Integrated amp, and now a Torii Mark II.

I have and use every day the Radial RL2s.

The Torii Mark II is the amp which lets these speakers sing and breathe. Makes them project, up, down, back, forwards. If you have even a medium size room, I would go for the Torii Mark II amps, the big Torii. I am astonished at how wonderful these amp sounds. It has all the great tonal and imaging qualities of the smaller amps. And it has power. All you'll need for the ERRs, which are more efficient than the RL2s.

Following your system changes with interest, Lon!You're obviously getting some wonderful music.I'm very interested in the Torii as well, (when budget permits)Your amp advice sounds good, it makes sense to have plenty of power on tap and then forget about "will it have enough grunt to satisfy"Don

I have the new ERR radials running with a Taboo amp. It satisfies me, no clipping, plays loud enough and even though I had a heck of a time getting all my gear to settle down partly due to my stupidity I might have done some things different. I'm a vinyl first kind of guy so my system requirements will be different from the digital guys but if I had to do it all again I think I would have gone big Tori. Now that I have a small fortune tied up in NOS and other EL84 type tubes it would be foolish for me to change. Maybe I will add another Taboo for more headroom.